Device to graduate the distance of the lines of typewriting-machines, specially for writing on ruled paper



B. SHATZ.

DEVICE T0 GRADUATE THE DISTANCE OF THE LINES 0F TYPEWRITING MACHINES,

SPECIALLY FOR WRITING 0N RULED PAPER.

APPLICATION FILED APR. 10, 1920.

1,401,653. Patented Dec. 27, 1921..

BARNETT SHATZ, OF BUENOS AIRES, ARGENTINA.

DEVICE TO GRADUATE 'I'EE DISTANCE OF THELINES OFTYPEWRITING-MACiHIId'ES,

. SPECIALLY FOR WRITING- ON' BULED'PAPEB.

Specification of Letters Patent.

Application filed April 10, 1920. Serial No. 872,940.

To all whom it may concern:

Be it known that I, BARNETT SHATZ, a citide 13y gra ually facilitatingthe work and rendering the regulation of the line spacing interval easyand rapid.

It is of course well understoodthat in typ ing machines as ordinarilyconstructed, the

. spacing of the lines is effected by the engagement of a pawl with theteeth of a ratchet-wheel, three spacings being ordinarily provided,which are known as single, double and trlple spaces. My improvedmechanism is designed to provide greater variation in the line spacingthan in lines employing the ordinary three spacings. Should it berequired to. space irregularly, however, as in filling in blanks, orshould a spacing be required other than the three arbitrary spacingsprovided by the spacing devices now generall in use, or should it bedesired to approxlmately fill a sheet of limited size with a certainnumber of lines which would not correspond with either of the threearbitrary spacings provided ordinarily, it would be necessary to throwoff the ordinary spacing mechanism and space each line by guess work byrotation of the platen, and frequently to shift the paper relatively tothe platen. It is also desirable at times to accurately space theprinting on ruled sheets of paper and this may be accomplished by myimproved mechanism.

A further object of the invention is to provide line spacing mechanismfor typewriting machines which may be manufactured at small cost and bereadily assembled, and which may .be quickly set for any desired widthof spacing.

With the foregoing objectsoutlined and with other objects in view whichwill appear as the description proceeds, the invention consists in thenovel features hereinafter descr bed in detail, illustrated in theaccompanylng drawing and more particularly pointed out in the appendedclaims. Referring to the drawing F igure 1 is an end view of atype-writer carriage having my improved mechanism attached thereto,

Fig. 2 is a front view of the same end of the typewriter carriage withmy mechanism applied.

Fig. 3 is a view of my improved mechanism taken from the opposite sidefrom that shown in Fig. 1, and showing the mechanism in normal position.

Fig. 4 is a view similar to Fig. 3 but showing the mechanism duringoperation.

11 the drawing, 1 designates a line space wheel provided with a geartoothed periph ery. This wheel is fixed on one end portion of the platenspindle 24 which carries the usual platen roller 19. A bell-crank leverhaving arms 2 and 3 is rotatably mounted on the spindle between thewheel 1 and the adjustable collar 32 which is held in place by theordinary spindle-head 31. The arm 2 of the bell-crank carries a swingingpawl 5 which is pivotally mounted'on a fulcrum screw 8, and a leafspring 6 is fixed to the arm 2 and engages the pawl 5 for normallymaintaining the same out of engagement with the teeth of the wheel 1. Astop surface 4 is provided on the arm 2 to limit the movement of thepawl in the direction in which it is forced by the spring 6. The pawl isswung in one direction in order to engage the teeth of the wheel 1, bymeans of a pm 15 carried by a push-rodor bar 14 which is slidablymounted in one end 25 of the type writer carriage. When the rod 14 isreciprocated the pin 15 will strike the upper portion of the pawl andwill cause the same to swing on its axis and engage the teeth of thewheel 1. Then the wheel-will turn with the pawl.

The turning movement of the bell-crank is limited in one direction bymeans of a fine pitch threaded screw 9 which engages a fixed nut 12 thatis secured to the end plate 25 by means of a screw 13. The lower end ofthe arm 3 of the bell-crank is designed to engage the screw 9 which actsas Patented Dec. 2'7, 1921.

Elli

a fixed stop for the bell-crank and as fine adjustments may be made bythe screw 9, the adjustment of the wheel may be made very minute. Thescrew 9 is provided, with a knuckled knob 10 designed. to be engaged bythe operator for adjusting the screw, and a combined gaging and locknut11 is mounted on the screw 9 between the head 10 and the fixed nut 12.The nut 11 may be used to lock the screw in any fixed, position or itmay be utilized to insure that the screw occupies a particular positionat all times. lln other words, the screw 9 may be adjusted from itsposition shown in Fig. 1 by unscrewing said screw and this w1ll causethe tightening nut 11 to rise w1th the screw. Then if the nut 11 ispermitted to remain in its original position relatively to the crew 9,the screw may be accurately brought back to its original positlon bylowerlng the screw until the nut 11 engages the fixed nut 12. This is adesirable feature in many instances as the screw 9 may be raised toermit say single pacing for a greater or ess portion of a page and thenthe screw may be lowered to bring the nut 11 back to its originalposition and the mechanism will then half-space or the like.

The push rod 14 is provided with a hand engaging head 18 desired tocooperate with the fixed stop 25 for limiting the rearward movement ofthe push rod. The push rod also has a stop pin 29 which projects fromthe opposite side of the rod from that of the pin 15 and which isdesigned to cooperate with a fixed stop 30 on the end plate of the frameto limit the outward movement of the push rod 14. A coil spring 29having one of its ends secured to a pin 17 carried by the push rod andits other end connected to a fixed member 21 on the end plate 25,functions to limit the push rod to.

its non al L )sition. A second coil spring 22 fixe rt 23 to me rut 12and at 28 to the arm 3, i designed to yieldingly hold the arm 3 inengagement with the lower end of the screw 9 and to return thebell-crank to its normal position after it has been turned by the pin ofthe push rod 14.

A cross-shaped leaf spring 26 is fixed by clips 27 to a sleeve 16mounted on the spindle 24, and functions to maintain the wheel 1 in adefinite position.

From the foregoing it will be seen that the adjustment of the screw 9will enable the platen roller 19 to be shifted various amounts dependingon the desire of the operator. When the operator adjusts the screw 9 tothe position desired, the push rod 14 may be operated and this willcause the pin15 to rock the pawl 5 on its fulcrum until said pawlengages the teeth of the line space wheel 1. Then the line space wheel,pawl and bell-crank will turn in unison upon the spindle 24 until thehand engageoneae ing member 18 strikes the stop 25. 'When the operatorreleases the push rod, the spring When the rod 14 is pushed rearwardlyit will travel in the direction of the arrow b shown in F ig. 4 and theline space Wheel will travel in the direction of the arrow a in saidfigure.

From the foregoing ll believe that the construction and operation of myimproved mechanism will be clearly understood by those skilled in theart and I am aware that Various changes and modifications may be made inthe construction shown without departing from the spirit of theinvention as expressed in the following claims.

I claim- 1. lin a type-writer, the combination with a platen roller andits spindle, of a toothed wheel fixed to said spindle, a bell-cranklever loosely mounted on said spindle and provided with a pawl designedto engage the teeth of said wheel, means for normally maintaining saidpawl out of engagement with the teeth of said wheel, a push-rod having apin engageable with said pawl to cause the pawl to grip the teeth of thewheel and to turn the Wheel and platen roller when the push-rod isoperated, and an adjustable screw engageable with the bell-crank leverfor limiting the oscillating movement of said bell-crank lever in onedirection.

2. In a type-Writer, the combination with a platen roller and itsspindle, of a toothed wheel operatively connected to said spindle, amovable member carrying a pawl engageable with the teeth of said wheelfor causing turning movement of the wheel and platen roller, anoperating member engageable with said pawl for causing the same to turnsaid wheel, an adjustable screw engageable with the first mentionedmember for limiting its movement in one direction, and an adjustablestop carried by said screw for use in gaging the extent of movement ofthe first mentioned member.

3. In a type-writing machine, the combination with a platen roller andits spindle, ofa fine toothed wheel fixedly mounted on said pindle, abell-crank lever pivotally mounted on the spindle, a pawl pivotallymounted on one arm of said bell-crank lever, a spring carried by saidarm and engageable with the pawl for normally holding the sameout ofengagement with the teeth of said wheel, a slidably mounted push-rodhaving a pinengageable with said pawl for shifting the same about itsfulcrum and causing it to engage the teeth of said wheel, a spring forreturning the pushrod to its normal position, a second spring forreturning the bell-crank lever to its normal position, and an adjustablescrew engageable-with the other arm of said bell- In testimony whereofhe ha signed his crank lever for llmiting the movement of name to thisspecification in the presence said bell-crank lever in one direction. oftwo subscribing witnesses.

4. A combination of the kind defined by BARNETT SHATZ. claim 3 in whichthe adjustable screw is pro- Witnesses: vided with a combined gaging andlook A. CARRAZZOY,

nut. RIGHD. Hows'r;

